This is an O-ring style gasket specifically molded with six mounting holes

OEM Compatibility: Genuine York S1-2845-3171 part ensures direct integration with model 2865C666 and related equipment

The set point is adjusted by removing the cover and turning the internal adjustment screw

Built into a durable 20-gauge metal enclosure

which simplifies the process of finding a matching set for multi-groove sheaves

Grundfos 00335021 Flange Set 320788-704 This is an O-ring styleThe Grundfos 00335021 is a heavy duty 2 inch NPT flange set designed for seamless integration with high head centrifugal pumps and circulators. Engineered to satisfy ANSI 250# flange pressure ratings, these cast iron components provide the structural integrity required for high pressure commercial hydronic systems. The kit facilitates a secure, leak proof transition between NPT threaded piping and flanged pump housings, ensuring optimal flow dynamics